Grain J, Barrau A
AstroParticule et Cosmologie, Université Paris 7, CNRS, IN2P3 10, rue Alice Domon et Léonie Duquet, 75205 Paris cedex 13, France.
Phys Rev Lett. 2009 Feb 27;102(8):081301. doi: 10.1103/PhysRevLett.102.081301. Epub 2009 Feb 26.
The primordial spectrum of cosmological tensor perturbations is considered as a possible probe of quantum gravity effects. Together with string theory, loop quantum gravity is one of the most promising frameworks to study quantum effects in the early universe. We show that the associated corrections should modify the potential seen by gravitational waves during the inflationary amplification. The resulting power spectrum should exhibit a characteristic tilt. This opens a new window for cosmological tests of quantum gravity.
宇宙学张量微扰的原初谱被视为量子引力效应的一种可能探测手段。与弦理论一起，圈量子引力是研究早期宇宙中量子效应最有前景的框架之一。我们表明，相关的修正应该会改变暴胀放大期间引力波所看到的势能。由此产生的功率谱应该呈现出一种特征性的倾斜。这为量子引力的宇宙学检验打开了一扇新窗口。
